Hiland a



H. A. HOLT.

(ModeL) LOCK.

Patented Feb. 12, 1889.

llj nircn rates PATENT thrice.

l-IILAND A. HOLT, OF N ASHUA, NElV HAMPSHIRE.

LOCK.

SPECIFICATION forming part of Letters Patent No. 397,501, dated February 12, 1889.

I Application filed May 26, 1888. Serial No. 275.101. (Modet) parts, as will be hereinafter described and claimed, whereby a very simple and reliable loek is )rodueed and which is rendered serviceable by reason of its construction as a rimlock, while it possesses many of the advantages of a mortise-lock.

111 the accompanying drawings, Figure 1 is an elevation of the lock, its cap or covering being removed and the latch bolt locked. Fig. iis an elevation of the lock with its cap or cover removed and the latch-bolt unlocked. Fig. 3 is an inner view of the cap or cover of the lock-case. Fig. l is a longitudinal section through thelock and portions of a door and a door-casing or door-frame, the section being in the center line of the latch-bolt and knoblever. Fig. 5 is a detail view of the interlocking tumblers and portions of the latch-bolt and lock-case.

The letter A in the drawings reln'esents the main plate, and B the cap or covcrot' the lockcase; 0, the latch-bolt; l), the knob-lever, and E and F locking-tumblers. The latch-bolt C is of angular form, as shown, and the main plate A of the case is made angular, as indicated by the letters a a, the portions a a forming a special compartment for the angular port-ion of the bolt and the latchingnose 0, which is attached to the said angular portion and passes in and out through a slot, a, in the rim-plate (I, which is set back beyond the tuniblcr-eom mrt-ment of the case, so as to have its slot o coincide with the slot a in a striker or keeper plate, a fastened in the ei'lge of the door-jamb A in the same manner and place that a mortise-lock striker or keeper is applied. The angular portion 0 of the bolt and the major portion of the latching-nose c are located within and protected by the portions a and a of the lock-ease, and thus located the latching-nose 0 will, when the lock is fastened to the surface of the door A, with its portion a a, embedded into the door, as shown, he brought opposite the keeper or striker plate a, set in the edge of the jamb of the door-frame, the same as if an ordinary mortise-lock were used. Thus a rinrlock is provided which has its latching-nose n arranged on a plane between the inside and outside surfaces of the door, and all the advantages of amortise-loek, except concealment of the lockcase,are secured, no projection of the latching-110st: keeper beyond the face of the door and the door-jamb of the frame or casing being necessary with my construction, and when the door is locked the nose and keeper are perfectly concealed.

The nose of the bolt is provided with a round pivotal shank, c, which is titted to the portion 0' and riveted at a so as to be held in place and yet by a slight force be turned around. By this construction of the latching-nose it can be reversed in position, thus making the look a right or left hand lock, and allowing the look to be put on either edge of a door-a great ad vantageit being essential that a rim-lock shall be capable of being placed on. the inside or room side, so that it shall not be accessible by means of screwdrivers or the like tools. The rear portion of the latch-bolt is forked at c and provided. with lugs 0 which are operated by the arms d of an ordinary knob-lever, D. 'Aspring, G, fastened to a slotted post, d of the plate A, bears upon a pin, a, of the latch-bolt and gives to it the required forward tendency.

An angular notch, c is provided in the straight body portion of thebolt G, into which notch the similarly-angular end portion, 6, of the diagonal tumbler E enters when the latchbolt is to be locked, and leaves the same when the latch-bolt is to be relieved, as is shown in Figs. 1. and 2, respectively. This tumbler E swings upon a pivot, c, which latter stands back of the notch c sufficiently to hold the tumbler in an inclined position when looking the latelrbolt. Near the key-hole a the tumbler E flares apart, forming two branches, 6' c right and left of the key-hole,

which are alternately operated by the key. These branches 9 e are so shaped that when operated by the lock-key, which is a key of ordinary and simple construction, the end portion, 0, is either moved entirely out of the il notch c spvtirmly lodged into it, thus either relieving orlocking thelai'clrbolt. The tumbler E is provided with a lug, e", torn'ied. on top of it, and occupying a part of a notclnf,

in the end portion of atumbler, 1 pivoted at a to the plate A. A spring, ll, held in a kerf,

10 f, of the tumbler F, and bearing against the post serves by its tension to hold the notched portion of it upon the lug c, and thereby prevent the movement of the tumbler E by any but the proper means.

\Vhen the latch-bolt C is unlocked or relieved, the tumbler F is moved by the spring H upon a post, a of the plate A, and thus prevented from. getting before the key-hole and preventing the .insertion of the key. The

same post a prevents the branch 6 from be ing accidentally moved so far back as to cause the branch e to stand before the keyhole. The tumbler E is prevented from accidentally swinging back into the notch c by the lug e", which comes in contact with the end portion of the tumbler F before it can enter said notch. Vhen the latch-bolt G is to be unlocked or relieved, the key is inserted through the key-hole into thelock and turned in the direction of the arrow shown in Fig. l. The tumbler is thereby thrown back from the lug e", and held away from it until the tumbler E is moved out of the notch by the pin striking and moving the branch 6?. \Vhile the tumbler-E is thus moving the lug e passes the tumbler F, and when the key finishes its revolution the tumbler l moves, by means of the tension of the spring ll, against the post (i as seen in Fig. 2. \Vhen the latch-bolt is 4.0 to be locked, the key is turned in the direction of the arrow shown in Fig. 9. It strikes the tumblei-F at first, and swings it forward to the position shown in the dotted lines, in which it is kept until the tumbler E begins 4 to move toward the notch o in the latch-bolt, by reason of the key striking the branch c". when the tumbler catches over lug e. 'der to prevent unauthorized persons from forcing-the latch bolt upward or forward; a

In or-- post, a is formed on the lock-plate and in the corner formed by the forked portion 0 and the main body-portion of the latch-bolt U. The cover is provided with a key-hole, I), postlr", and ribs D 1)" for holding the mechanism to the case-plate A, and with a bearing, 1)", for the knob-lever l), and a fastening-post, b which latter receives the ordinary fastening-screw of the lock when united with the same.

Steadying-lugs or, or other suitable means, are employed with the case-plate A, which hold the cover B in the proper postion. The latching-nose will in some locks be firmly fastened to or constructed homogeneously with the angular bolt, and my invention is therefore intended to include both a reversible and a non-reversible latching-nose.

\Vhat I claim is 1. A door-lock adapted to be placed-011 either the inner or outer side of a door, comprising a lock-case, A, having an angular chamber, a sliding-bolt having an offsetting fastening portion, which is about on a line central with the edge of the door and adapted to engage with an ordinary striker or keeper inserted in-the casing or framing of the door, and a lockingtumbler mechanisi'n comprising tumbler E, substantially as and for the purpose described.

2. The coi'nbined rim and mortise lock comprising a lockirig-tumbler mechanism, a sliding latch-bolt, (7, having an angular portion,

0 and a latching-nose, c, and a case havinga main plate, A, provided with an angular rim-plate portion, 0, and an angular protecting portion, a, and a locking-tumblermechanism comprising tumbler E, substantially as and for the purpose described.

3. The combination of the latch-lmltC, having notch 13", the tumbler E, having branches e and lug c", and the tumbler F, having notch and spring l'l, substantially as described.

In testimony whereof I hereunto aiiix my signature in presence of two witnesses.

HILAND -A. HOLT. lVitnesscs:

J osEPH L. CLOUGH, FAYETTE S. SARGENT. 

